A Method of Fast Aircraft Flutter Analysis Using MSC.NASTRAN DMAP

A Method of Fast Aircraft Flutter Analysis Using MSC.NASTRAN DMAP Abstract Flutter evaluation of an aircraft is an essential part of its design procedure. Usually, there are two steps for calculating aircraft flutter speed. The first step is simulating the dynamic properties of aircraft and/with external stores with finite element model. The second step is calculation of the aircraft flutter speed and frequency. It takes a long period of time for this method of aircraft flutter analysis. Furthermore, it is depend on the test data of the aircraft ground vibration test (GVT) for simulating the dynamic properties of aircraft with external stores. This paper presents a fast method of aircraft flutter analysis using the test data of aircraft ground vibration test. 1 Lead Aeroelastic Engineer of CAC 2 Aeroeastic Engineer of CAC 3 Vice President of R&D Dept. of CAC, PH.D 4 Lead Computer Engineer